Počet záznamů: 1

Special fracture mechanics specimens for multilayer plastic pipes testing

  1. 1.
    0332041 - UFM-A 2010 RIV GB eng J - Článek v odborném periodiku
    Hutař, Pavel - Šestáková, Lucie - Knésl, Zdeněk - Nezbedová, E. - Náhlík, Luboš
    Special fracture mechanics specimens for multilayer plastic pipes testing.
    Polymer Testing. Roč. 28, č. 8 (2009), s. 785-792 ISSN 0142-9418
    Grant CEP: GA ČR GA106/09/0279; GA ČR GC101/09/J027
    Výzkumný záměr: CEZ:AV0Z20410507
    Klíčová slova: Multilayer plastic pipes * C-type specimen * K-calibration * Fracture toughness * Slow crack growth * Non-homogenous specimens
    Kód oboru RIV: JL - Únava materiálu a lomová mechanika
    Impakt faktor: 1.667, rok: 2009

    Pipes consisting of layers of different materials (multilayer pipes) are considered. The fracture toughness value of the main pipe is taken into account as a parameter relevant to fracture assessment connected with the resistance of pipe material against slow crack growth. With the aim of simplifying estimation of main pipe material fracture toughness, non-homogeneous test specimens cut directly from multi-layer pipes are suggested and numerically analysed. The values of the corresponding stress intensity factor KI and biaxiality factors B are calculated for the case of two and three layer test specimens. Based on the results obtained, the transferability of fracture toughness values measured on laboratory specimens to pipe systems is discussed. It is shown that in most cases of multilayer commercial pipes and routine fracture toughness measurements the values of the stress intensity factor calculated on the basis of homogeneous specimens can be used.
    Trvalý link: http://hdl.handle.net/11104/0177397